Chemically activated shaped carbon, process for producing same and use thereof

Abstract

A chemically activated shaped carbon suitable for adsorbing and desorbing hydrophobic organic compounds and having the specific properties in bulk density, pore volume, bulk density x pore volume, surface area, bulk density x surface area, mean pore size and the effective amount of adsorption of butane, a process for producing thereof and use thereof.

What is claimed is: 
     
       1. A process for producing a chemically activated shaped carbon suitable for adsorbing and desorbing hydrophobic organic compounds which comprises heating and reacting at 100° to 160° C. a mixture of a chemically activatable starting material selected from the group consisting of coconut shells, wood chips and saw dust, and 40 to 70% aqueous solution of an activating chemical comprising zinc chloride in a ratio of 1/0.6 to 1/3.0 by dry weight of their respective solid content, shaping the reaction mixture at a temperature of 90° to 160° C. when the total weight of the reaction mixture has become 90 to 115% of the dry weight of the solids in the mixture before heating, thereafter calcining, washing and drying the shaped product by a conventional method followed by further activating the shaped product with a gas to thereby obtain a shaped activated carbon, said shaped activated carbon having such properties that it has a bulk density of 0.25 to 0.6 g/cm 3 , a pore volume of 0.5 to 1.2 cm 3  /g, a bulk density x, pore volume of 0.25 to 0.4 cm 3  /cm 3 , a surface are of at least 1000 m 2  /g, a mean pore size of 18 to 35 angstrones, a bulk density x surface area of at least 400 m 2  /cm 3 , and which adsorbs butane in an amount of 5.0 to 15 g/100 ml. 
     
     
       2. A process according to claim 1 wherein the product is shaped by pressing. 
     
     
       3. A process according to claim 1 wherein the product is shaped by extrusion. 
     
     
       4. A process according to claim 1 wherein the gas is water vapor or carbon dioxide. 
     
     
       5. A process according to claim 4 in which the gas is used at a partial pressure of 30 to 60% for calcining the shaped carbon at a temperature of 850° C. to 1000° C. for a period of from 10 minutes to 4 hours.